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Search: id:A026037
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A026037 a(n) = dot_product(1,2,...,n)*(3,4,...,n,1,2). +0
4
11, 22, 40, 67, 105, 156, 222, 305, 407, 530, 676, 847, 1045, 1272, 1530, 1821, 2147, 2510, 2912, 3355, 3841, 4372, 4950, 5577, 6255, 6986, 7772, 8615, 9517, 10480, 11506, 12597, 13755, 14982, 16280, 17651, 19097, 20620, 22222, 23905, 25671, 27522, 29460, 31487, 33605, 35816, 38122, 40525, 43027 (list; graph; listen)
OFFSET

3,1

FORMULA

n(2n^2-3n+13)/6. - R. Stephan, Apr 30 2004

CROSSREFS

Column 2 of triangle A094414.

Sequence in context: A109016 A084025 A061157 this_sequence A122613 A115768 A005015

Adjacent sequences: A026034 A026035 A026036 this_sequence A026038 A026039 A026040

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.


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